Fig 4. Distributions of the estimator of knee function and the test battery variables.

The distribution of each of the variables included in the estimator of knee function (w) for each of the two groups, i.e. individuals with an ACL injury and healthy-knee controls. For the estimator of knee function, values close to 1 indicate a good knee function, and values close to 0 indicate the opposite. Quadriceps concentric strength was measured in Nm/kg; the one-leg hop for distance in meters, the one-leg balance in number of floor support, and the side hop in number of side hops.